Fliedner, Gene
Business Expert Press,, 2011
Buku Teks
Gaines, Kathryn
American Society for Training & Development, 2006
eBooks
Hayes, Philip
McGraw-Hill, 2011
Buku Teks
Reva Ariane
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2017
UI - Skripsi (Membership)
Cobb, Anthony T.
Sage, 2006
Buku Teks